The end-user receives this message on sign-in:

Message: upstream connection failed
Action: The upstream host could be down

This indicates the Agilicus Connector is up, and the user was able to sign in correctly, however, the customer-supplied application is either down, or unreachable from the Agilicus Connector.

A common issue is a change in IP/port of the application, you may change this as below.

To diagnose the issue, use the detailed stats from the connector overview page: